Effective fiber pigtailing procedure of a QD-SOA

The integration of laser-support fiber adjustment is presented as an alternative effective pigtailing method for traditional trial and error efforts using laser hammering or mechanical bending approaches. The mechanical micro module, which allows for a well-controlled accurate step-by-step alignment sequence of the fiber, together with the fiber pigtail procedure of a quantum dot semi-conductor optical amplifier are described. During the assembly process, post-weld-shifts and post-release-shifts to the order of 5 – 10 µm are compensated in the final re-alignment procedure with submicrometer accuracy resulting in an optimal optical power coupling between the singlemode fibers and the amplifier. We measured stable coupling connections by driving a current of 1 A trough the device at a chip temperature of 10 °C